feat: 实现供水运营专题大屏BI可视化

- 新增OperationDashboard.vue全屏大屏组件
- 添加6个核心KPI指标卡片: 进水总量/出水总量/产销差率/营收额/平均水质/报警次数
- 实现6个ECharts图表: 供水趋势/水质分布/报警统计/管网空间/设备状态/营收分析
- 创建静态HTML版本operation-dashboard.html，使用CDN加载Vue3/ECharts/Element Plus
- 更新路由配置，添加/operation路径支持
- 修复nextTick导入问题，优化build脚本

🚧 开发者: bot_dev1
📝 任务: #38 [BI] 运营仪表盘 + 供水专题大屏

frontend/node_modules/leaflet/src/geo/projection/Projection.LonLat.js

@@ -0,0 +1,28 @@
+import {LatLng} from '../LatLng';
+import {Bounds} from '../../geometry/Bounds';
+import {Point} from '../../geometry/Point';
+
+/*
+ * @namespace Projection
+ * @section
+ * Leaflet comes with a set of already defined Projections out of the box:
+ *
+ * @projection L.Projection.LonLat
+ *
+ * Equirectangular, or Plate Carree projection — the most simple projection,
+ * mostly used by GIS enthusiasts. Directly maps `x` as longitude, and `y` as
+ * latitude. Also suitable for flat worlds, e.g. game maps. Used by the
+ * `EPSG:4326` and `Simple` CRS.
+ */
+
+export var LonLat = {
+	project: function (latlng) {
+		return new Point(latlng.lng, latlng.lat);
+	},
+
+	unproject: function (point) {
+		return new LatLng(point.y, point.x);
+	},
+
+	bounds: new Bounds([-180, -90], [180, 90])
+};